3 adjectives to describe lintel

Hollow lintels are also made of the slabs keyed together at their vertical joints, and when in position these are filled in with beton.

"What's the good o' talkin'?" he answered; but he paused, turned, and leaned heavily against the rude lintel.

The blood of the lamb was to be sprinkled on the two side-posts and upper lintels of every door.

3 adjectives to describe  lintel